Automatic gas-extinguisher



2 Sheets-Sheet 1.

T; WLHAMILTON. Automatic Gas-Extinguishers.

"Patented Feb.'24, 1880..

N. PETERS. PMOTO-LITHOGRAPHER. WASHINGTON. QC.

2 SheetsSh'eet 2.

T. W. HAMILTON. Automatic Gas-Extinguishers;

Patnted Feb. 24, 1880.

MPEYERS, FIQOTO-LITHOGRAPHER, WASHINGTON, DC.

, UNITED STATES PATENT OFFICE.

THOMAS HAMILTON, OF SPRINGFIELD, MASSACHUSETTS.

AUTOMATIC GASEEXTINGUISH ER.

SPECIFICATION forming part of Letters Patent No. 224,776, dated February Application filed December 15, 1879.

To all whom it may concern:

hour of the-night irrespective of the degree of Be it known that I, THOMAS W. HAMILTON, of Springfield, county of Hampden, and State of Massachusetts, have invented new and useful Improvements in Self-Extinguishing Gas- Light Apparatus, which improvements arefully set forth in the annexed specification, and in the accompanying drawings.

The object of my invention is the construction of an improved gas-light-extinguishing apparatus to be used on street-lamps, which can, at the time the burner is lighted, be so adjusted as to extinguish the light at a certain pressure existing in the gas-mains 5 and it consists of the combination, with a clock-movement, of mechanism for wholly or partially winding up said clock, for (simultaneously with said winding up) opening the gas-supply cock and starting the clock, and of m echanism for causing said cock to be shut after the. expiration of a certain number of hours.

Referring to the drawings, Figure l is a front elevation of my machine. Fig. 2 is a rearelevation of the winding-wheel and its linked winding-chain. Fig. 3 is a front elevation of the gas-cock plug with its operating-cam, of the end of a shaft carrying a cam which operates the latter one, and of the gas-cock trigger. Fig. 4 is a view of the graduated winding-bar, and Fig. 5 is a view of parts back of the clockmovement. 7

Like letters refer to like parts in the several figures.

Upon a suitable frame or case, A, having a vertical gas-passage on its rear side, terminating at a point to allow of screwing on the burner B, and having its inlet-at 0, into which the gas-supply tube is screwed, Ifix the requisite mechanism to operate for the purpose here- .inbefore stated, and as hereinafter set forth.

Into case A, andacross the said gas-passage, I fit a gas-cock plug, a, of ordinary construction, and on said plug I secure the cam I),

having an arm, 0, thereon, and a sear-catch, e, and outsideof said cam a coiled spring, d, one end of which is attached to post i in the case A.

, Near tothe gas-cock a is a gear-wheel, o, having a hollow hub, and arranged to run on a stud set in case A. On the face of gear 0 is secured a cam, 0, (fully shown in Fig. 3,) and on the hollow hub of said gear'o is secured ing a short stud, r, set in its upper end and projecting from its rearface. Said triggerlever h is caused to swing toward cam 12 by a spring, 2.

On a stud in case A is set the main winding a-nd intermediate gear, H, .which operates between the clock-work and the gas-cock to shut off the gas and to open the gas-cock when the machine is set to light the burner. Said gear-wheel H gears into wheel 0, heretofore mentioned, and into a gear, 8, at the top of the case, which fits onto the windingshaft 5 of the clock-movement.

On the front face of gear H is cut a shallow circular groove, 6, on the inner edge of which is set a projecting cam-block, 7. The triggerlever 71. stands up in front of gear H, and its stud r projects into groove 6 therein.

The rear side of gear H is suficiently removed from case A to allow the pins 8, Fig. 2, to be set-therein, on one of which is pivoted the notched solid-link chain 9, said gear and chain being shown in said Fig. 2 as they appear when the clock is wound up.

' In case A is formed a channel, 10, leading from the bell-mouth 1.1 up behind gear H, and in said channel the free end of chain 9 lies, sliding downward therein when the clock is running down. The bell-mouth '(shown in Fig.1) represents only one half of it, its other half being formed upon the cover which shuts over the parts seen in said figure.

Secured properly on case A, in frontof gear H, is the clock-movement K, which is of ordinary construction, and runs by asprin g, 12, attached to the winding-shaft 5. The squared end of this shaft fits into the aforesaid gear 8, which is geared into wheel H. Thus therevolution of the latter wheel in one direction winds up the spring 12, andthe reverse movement of shaft 5, as the clock runs down, through gear 8, causes wheel H to revolve in a direction contrary to the one in which it turned when the clock was wound up, actuated by mechanism hereinafter described.

Projecting downward from the clock-work K, and supported thereby, is a plate, 13, on which is pivoted an oscillating let er, 14, its lower end projecting down opposite the end of arm 0 on cam b, and its upper end reaching up slightly above the lower end of the escapement-arm 15. Its said upper end is bent forward from plate 13, and when lever 14 swings on its pivot its upper end will trip against the lower end of arm 15, and cause it to set the balance-wheel of the clock in motion and start.

the clock. A spring, '16, throws the upper end of lever 14 over against a pin, 17 when arm 0 is clear from its lower end.

The winding-bar, Fig. 4, is adapted to be. passed into channellO through the bell-mouth 11, its upper end resting against the end of the lower link of chain 9, and it can be passed into said channel as far as the position of the stops 18 thereon will permit. Said stops 18 are pivoted, as shown, between the ends of two sliding bars, 19, and said bars and stops are arranged to slide on the graduated bar, and to be held in the desired position thereon by the entrance of the sharpened ends of the stops into the notches on the edges of the bar, as shown. The lower ends of the stops below their pivot-points terminate in lever-handles, under which are springs, which operate to cause their upper ends to press into said notches. By pressing said lever-handles toward each other the stops maybe slid on the bar and set at the requisite figure.

A socket, 20, is provided, at the base of said bar, which allows of fixing it on the end of a gas-lighters rod.

Across the face of the winding-bar are graduation-marks, and figures are stamped thereon, as shown.

When it is desired to wind the clock to run a certain number of hours the stops 18 are set at a figure corresponding thereto, which prevents said bar being passed into channel 10 beyond a fixed point, which, as hereinafter described, determines the requisite winding of the clock.

The operation of my apparatus is as follows, viz: In a state of rest, or before. being operated by the gas-lighter to be wound up and to open the gas-cock, so that the gas-lamp can ger-lever and cams b and 0 are relatively in the positions shown in Fig. 3, and the gascock at is shut.

The winding-bar having been adjusted as heretofore described, the operator places its upper end against the lower end of chain 9, and pushes said chain upward. This chain said pins, as seen in Fig. 2.

.is, by the adaptation of it to channel 10, con1- pelled to move in a direct line toward one of pins 8 on the rear side of wheel H, and, hooking onto said pins by the notches in one side of it, the chain causes said wheel to revolve on its axis, while the chain becomes wound on In so revolving wheel H cam 7 is carried away from triggerlever h, allowing it, actuated by spring 2, to swing toward cam I) and against a pin, it, set

.incase A. At the same time wheel H, through gear .9, by which shaft 5 of the clock is revolved, .winds up the latter, and revolving gear 0 causes cam d on its shaft to turn in the direction indicated by the arrow thereon and strike on the top of cam b on cock a, causing said latter cam to move around with it far enough to bring the sear-catch 6 up where the hook 'u on trigger-lever h will snap under it. The said movement of cam 1) causes the gascock a to be opened, and arm 0 on said cam to be thrown against the bottom end of lever 14, as shown in Fig. 1, thus causing the upper end of said lever to be thrown over from pin 17, striking in its passage the lower end of escapement-arm 15, setting the balance-wheel of the clock in motion.

The above-described motions of wheel 0 and cam b have been made against the force of springs 61 and d.

With the parts of the apparatus in the positions just described the burner B can be lighted, and the clock-movement ,runs during the time for which it was wound, as aforesaid, and wheel H is now allowed to rotate slowly by the clock-movement, being turned mainly by Wheel 0, which is revolved by the action of spring d, gradually carrying earn 7 on wheel H toward the pin 1" in the triggerlever h, and when said cam is brought against it said trigger is crowded away from its contact with the catch 6 on cam 12 and caused to be disengaged from it, and at the instant of such disengagement said cam and the gas cook plug to which it is attached revolve quickly back to the position shown in Fig. 3, actuated by spring 02, causing the gas-supply to be instantly shut off and the light to be eX- tinguished.

It will be seen that at the time the above= named shut-off action takes place the cam 0 is not in a position to obstruct the free action of the gas-cock a, and that the duration of the lighted period of the burner is determined by the distance that cam 7 is left from lever h when the apparatus is set for burning, and that the backward rotation of Wheel H does not operate to retard the free operation of theclock-spring in performing its function, for spring 61 on wheel 0 more than serves to turn wheel H back and partially assists the clock-spring to run the clock-work.

What I claim as my invention is-- 1. In combination, the wheel H, provided with pins 8, the chain 9, having notched links, as shown, the gear-wheel s, and the clock movement K, substantially as and for the purpose set forth.

2. The combination, with wheel H and chain 9, of gear 0 and spring 01, substantially as and for the purpose described.

3. The cam I), secured to and adapted. to revolve the gas-cock plug a, provided with catch 6, and adapted to be revolved in one direction by a spring, d, in combination with the trigger-lever h and the wheel H, provided with cam 7, substantially as and for the purpose set forth. a

4. The combination, with cam b, secured to and adapted to revolve the gas-cock plug a, of wheel 0, provided with cam 0, wheel H, and

chain 9, substantially as and for the purpose "described.

5. The combination, with the escapementarm 15, of lever 14, spring 16, and arms on cam b, substantially as and for the purpose set forth.

6. The combination,

low in the bell-mouth 11, of the chain 9 and wheel H, substantially as and for the purpose described.

7. The combination, with the clock-movement K, of the wheel .9, the wheel H, provided with the cam '7, the trigger-lever h,'cam b, spring d, and the gas-cock plug a, substantially as and for the purpose set forth.

8. The winding-bar having serrated edges, as showmand bearing upon its face a series of numerals, in combination with the sliding bars 19 and the pivoted stop-levers 1-8, substantially as and for the purpose set forth.

THOMAS w. HAMILTON.

Witnesses H. A. UHAPIN, WM. H. UHAPIN.

with case A, having I channel 10 formed therein and terminating be- 

